From: Yoshimasa Niwa <redmine@...>
Date: 2009-08-21T02:56:16+09:00
Subject: [ruby-dev:39148] [Bug #1969] irb will be stuck with long variable name with completion.rb

Bug #1969: irb will be stuck with long variable name with completion.rb
http://redmine.ruby-lang.org/issues/show/1969

起票者: Yoshimasa Niwa
ステータス: Open, 優先度: Normal
ruby -v: ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin9]

Requiring "irb/completion", we then hit Tab after a long variable name, irb will be stuck.

% irb
irb(main):001:0> require 'irb/completion'
=> true
irb(main):002:0> a.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa[Hit Tab key]
(Nothing happen, just eating CPU)
irb(main):002:0> ::A::BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB[Hit Tab key]
(Nothing happen, just eating CPU)

I attached the patches to fix this issue.
This issue seems to be caused by a problem of longest matching of regular expressions.
These patches are based on Haruo Nanki <nanki@dotswitch.net>'s good suggestions.

irbでirb/completionがrequireされているときに、長い変数名、クラス名の後でTabを押すと固まります。
正規表現の最長一致の問題と思われます。
南木さん<nanki@dotswitch.net>の指摘をもとに作成したパッチを添付しますのでご確認ください。


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